Whimventory allows you to create wishlists while you shop online. Using a bookmarklet you add to your web browser, you can add new items to different lists without leaving the site you’re shopping from. Once you have a list, you can sort, filter, and edit the items in it. You can also share lists with others, or keep them private. If someone decides to buy you something from one of your lists, they can anonymously mark the item as purchased to prevent duplicate gifts.
If you ask me, this is perfect for Wedding Registries! Or if you have savvy internet teenagers this would make for a modern approach to a holiday wishlist! Check out this example.